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soils

A line of giant stone moai from Rapa Nui (Easter Island).
Posted inNews

Settlement of Rapa Nui May Have Been Doomed by a Dearth of Dust

by Rachel Fritts 16 December 202121 March 2022

Rapa Nui and Hawai‘i offer a tale of two island settlements: Hawai‘i was close enough to Asia for continental dust to help replenish soil nutrients depleted by agriculture. Rapa Nui wasn’t.

A chat, or waste, pile near the Tar Creek Superfund site in Oklahoma.
Posted inNews

Community Input Drives Superfund Research

by Robin Donovan 14 December 20217 March 2022

Researchers identified geochemical tracers for lead and investigated Oklahomans’ concerns at the Tar Creek Superfund site.

Conceptual diagram showing how solute transport in saturated fine-textured and course-textured soils is altered by root exudates.
Posted inEditors' Highlights

Plant Root Exudates Mediate Soil Nutrient Transport

by D. Scott Mackay 9 December 20218 April 2022

Plant roots mediate solute transport through the soil immediately surrounding them by introducing polymers and other binding compounds that disrupt water transport pathways between soil pore spaces.

Mole configuration during the heating experiment after scraping soil into the mole pit.
Posted inEditors' Highlights

Not So Hot Under the Collar

by Germán Martinez and B. J. Thomson 27 August 202110 March 2022

Thermal properties of Martian soil as measured by the InSight lander.

Part of Canberra, Australia, where scientists have been using geochemical analysis to develop a predictive soil provenancing method.
Posted inNews

Predictive Forensics Helps Determine Where Soil Samples Came From

by Tim Hornyak 16 August 202118 November 2021

Researchers deploy geochemical analyses to narrow down the search area for a soil sample’s site of origin—an approach that could prove useful to law enforcement.

Trowel and collection tools sit in a dry desert.
Posted inNews

Desert Life Conjures Organic Carbon from Thin Air

by Elise Cutts 10 August 202122 December 2021

Without water, photosynthesis shuts down. To survive dry spells, desert microbes scavenge traces of hydrogen from the air and burn it for energy. Some even use hydrogen to fuel carbon fixation.

Image of a person carrying plastic chairs through floodwaters in Buliisa, Uganda
Posted inNews

Soil Saturation Dictates Africa’s Flood Severity

by Ellis Avallone 30 July 202128 September 2021

The most complete hydrological data set for the African continent reveals a surprise: Soil moisture, not heavy precipitation, best explains the timing of Africa’s most severe floods.

Vista desde el suelo de una marca de tractor en un suelo de un campo de cultivos
Posted inResearch Spotlights

Una mirada global al carbono orgánico superficial del suelo

by David Shultz 14 July 202128 September 2021

El carbono orgánico del suelo es un elemento importante para la salud de los ecosistemas y del clima. En la actualidad la teledetección permite a los científicos observar globalmente esta importante pieza del rompecabezas del carbono.

A person’s gloved hand holds part of an ice core in which air bubbles can be seen, with the Antarctic landscape in the background. The ice in the core is up to 24,000 years old.
Posted inAGU News

Cutting to the Core

by Heather Goss 24 June 202114 April 2022

In our July issue, Eos looks at the collection, study, and storage of cores—from sediment drilled up from the age of the dinosaurs to tree rings as big as a house.

Long aisle in a storage facility lined with metal tubes of ice cores
Posted inFeatures

Cores 3.0: Future-Proofing Earth Sciences’ Historical Records

by Jane Palmer 24 June 202127 October 2021

Core libraries store a treasure trove of data about the planet’s past. What will it take to sustain their future?

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